11661659 has 2 divisors, whose sum is σ = 11661660. Its totient is φ = 11661658.

The previous prime is 11661653. The next prime is 11661691. The reversal of 11661659 is 95616611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11661659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11661653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830829 + 5830830.

It is an arithmetic number, because the mean of its divisors is an integer number (5830830).

Almost surely, 2^11661659 is an apocalyptic number.

11661659 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661659 is an equidigital number, since it uses as much as digits as its factorization.

11661659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 11661659 is about 3414.9171293020. The cubic root of 11661659 is about 226.7706157685.

The spelling of 11661659 in words is "eleven million, six hundred sixty-one thousand, six hundred fifty-nine".